Luminescent properties of SrSi_2N_2O_2:Ce~(3+),Tb~(3+)-a potential phosphor for white light emitting

• 作 者: 鞠海东 苏醒宇 王宝玲 邓德刚 赵士龙 徐时清
• 机 构: Department of Chemistry,Kunming University,College of Materials Science and Engineering,China Jilian
• 出 处: Journal of Rare Earths
• 发表日期: 2012年02期
• 关键词: phosphor Tb coordinates attributed coordinate remarkably ultraviolet prepare exc

Ce3+ and Tb3+ co-doped SrSi2N2O2 phosphors were prepared by solid-state reaction. The X-ray diffraction pattern exhibited that the phosphor consisted mainly of oxygen-rich SrSi2N2O2. The optical properties of SrSi2N2O2:Ce3+, SrSi2N2O2:Tb3+ and SrSi2N2O2:Ce3+,Tb3+ were studied, respectively. The emission intensity of Tb3+ at 541 nm was remarkably enhanced by Ce3+ in SrSi2N2O2:Ce3+,Tb3+ phosphor, which was attributed to the energy transfer from Ce3+ to Tb3+. The chromaticity coordinates of phosphors were investigated as a function of Tb3+ concentration. When the Ce3+ and Tb3+ concentrations were 0.02 and 0.18 mol per formula unit, respectively, the chromaticity coordinate was (0.257, 0.337) in the CIE 1931 chromaticity diagram. SrSi2N2O2Ce3+,Tb3+ phosphors could be used for white light emitting diodes.

The optical properties of SrSi2N2O2: Ce3 +, SrSi2N2O2: Tb3 + and SrSi2N2O2: Ce3 +, SrSi2N2O2: Ce3 + and Tb3 + co-doped SrSi2N2O2 phosphors were prepared by solid- Tb3 + were studied, respectively. The emission intensity of Tb3 + at 541 nm was remarkably enhanced by Ce3 + in SrSi2N2O2: Ce3 +, Tb3 + phosphor, which was attributed to the energy transfer from Ce3 + to Tb3 +. The chromaticity coordinates of phosphors were investigated as a function of When the Ce3 + and Tb3 + concentrations were 0.02 and 0.18 mol per formula unit, respectively, the chromaticity coordinate was (0.257, 0.337) in the CIE 1931 chromaticity diagram. SrSi2N2O2Ce3 +, Tb3 + phosphors could be used for white light emitting diodes.